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Oracle 10.2.0.5 版本之后 asm disk header 自动备份机制

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Release： 2016-06-07 16:43:28
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Oracle 10.2.0.5 版本之后 asm disk header 自动备份机制

在10.2.0.5 版本之前 ASM disk header没有自动备份，，需要手动执行kfed read或者dd来备份，

从10.2.0.5 之后 开始ASM disk header会自动备份到第一个AU#1的倒数第二个block。


AU size是1MB的DISKGROUP，每个AU包括block数量=1024KB/4KB=256个，因此备份信息位于AU#1的第254号block

AU size是2MB的DISKGROUP，每个AU包括block数量=2048KB/4KB=512个，因此备份信息位于AU#1的第510号block

AU size是4MB的DISKGROUP，每个AU包括block数量=4096KB/4KB=1024个，因此备份信息位于AU#1的第1022号block

AU size是8MB的DISKGROUP，每个AU包括block数量=8192KB/4KB=2048个，因此备份信息位于AU#1的第2046号block

AU size是16MB的DISKGROUP，每个AU包括block数量=16384KB/4KB=4096个，因此备份信息位于AU#1的第4094号block

如果不加au=1的参数的话，则是以下block

AU size是1MB的DISKGROUP，每个AU包括block数量=1024KB/4KB=256个，因此备份信息位于的第510号block

AU size是2MB的DISKGROUP，每个AU包括block数量=2048KB/4KB=512个，因此备份信息位于的第1022号block

AU size是4MB的DISKGROUP，每个AU包括block数量=4096KB/4KB=1024个，因此备份信息位于的第2046号block

AU size是8MB的DISKGROUP，每个AU包括block数量=8192KB/4KB=2048个，因此备份信息位于的第4094号block

AU size是16MB的DISKGROUP，每个AU包括block数量=16384KB/4KB=4096个，因此备份信息位于的8190号block


以下是12c的测试过程，是加au=1参数的

1：au size 为1M
[grid@12cdb1 ~]$ kfed read /dev/sde1 aunum=1 blknum=254 ausz=1048576|more
kfbh.endian: 1 ; 0x000: 0x01
kfbh.hard: 130 ; 0x001: 0x82
kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt: 1 ; 0x003: 0x01
kfbh.block.blk: 254 ; 0x004: blk=254
kfbh.block.obj: 2147483648 ; 0x008: disk=0
kfbh.check: 2583217763 ; 0x00c: 0x99f8c663
kfbh.fcn.base: 0 ; 0x010: 0x00000000
kfbh.fcn.wrap: 0 ; 0x014: 0x00000000
kfbh.spare1: 0 ; 0x018: 0x00000000
kfbh.spare2: 0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8
kfdhdb.driver.reserved[0]: 0 ; 0x008: 0x00000000
kfdhdb.driver.reserved[1]: 0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]: 0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]: 0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]: 0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]: 0 ; 0x01c: 0x00000000
kfdhdb.compat: 202375168 ; 0x020: 0x0c100000
kfdhdb.dsknum: 0 ; 0x024: 0x0000
kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname: DGTEST_0000 ; 0x028: length=11
kfdhdb.grpname: DGTEST ; 0x048: length=6
kfdhdb.fgname: DGTEST_0000 ; 0x068: length=11
kfdhdb.capname: ; 0x088: length=0
kfdhdb.crestmp.hi: 33005044 ; 0x0a8: HOUR=0x14 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.crestmp.lo: 1303226368 ; 0x0ac: USEC=0x0 MSEC=0x36a SECS=0x1a MINS=0x13
kfdhdb.mntstmp.hi: 33005044 ; 0x0b0: HOUR=0x14 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.mntstmp.lo: 1314846720 ; 0x0b4: USEC=0x0 MSEC=0x3be SECS=0x25 MINS=0x13
kfdhdb.secsize: 512 ; 0x0b8: 0x0200
kfdhdb.blksize: 4096 ; 0x0ba: 0x1000
kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact: 113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize: 2047 ; 0x0c4: 0x000007ff
kfdhdb.pmcnt: 3 ; 0x0c8: 0x00000003
kfdhdb.fstlocn: 1 ; 0x0cc: 0x00000001
kfdhdb.altlocn: 2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn: 10 ; 0x0d4: 0x0000000a

2：au size 为2M

[grid@12cdb1 ~]$ kfed read /dev/sdd1 aunum=1 blknum=510 ausz=2097512|more
kfbh.endian: 1 ; 0x000: 0x01
kfbh.hard: 130 ; 0x001: 0x82
kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt: 1 ; 0x003: 0x01
kfbh.block.blk: 510 ; 0x004: blk=510
kfbh.block.obj: 2147483648 ; 0x008: disk=0
kfbh.check: 1308985061 ; 0x00c: 0x4e0586e5
kfbh.fcn.base: 0 ; 0x010: 0x00000000
kfbh.fcn.wrap: 0 ; 0x014: 0x00000000
kfbh.spare1: 0 ; 0x018: 0x00000000
kfbh.spare2: 0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8
kfdhdb.driver.reserved[0]: 0 ; 0x008: 0x00000000
kfdhdb.driver.reserved[1]: 0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]: 0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]: 0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]: 0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]: 0 ; 0x01c: 0x00000000
kfdhdb.compat: 202375168 ; 0x020: 0x0c100000
kfdhdb.dsknum: 0 ; 0x024: 0x0000
kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname: DATA_0000 ; 0x028: length=9
kfdhdb.grpname: DATA ; 0x048: length=4
kfdhdb.fgname: DATA_0000 ; 0x068: length=9
kfdhdb.capname: ; 0x088: length=0
kfdhdb.crestmp.hi: 33005024 ; 0x0a8: HOUR=0x0 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.crestmp.lo: 18385920 ; 0x0ac: USEC=0x0 MSEC=0x223 SECS=0x11 MINS=0x0
kfdhdb.mntstmp.hi: 33005058 ; 0x0b0: HOUR=0x2 DAYS=0x10 MNTH=0x7 YEAR=0x7de
kfdhdb.mntstmp.lo: 2644348929 ; 0x0b4: USEC=0x1 MSEC=0x364 SECS=0x19 MINS=0x27
kfdhdb.secsize: 512 ; 0x0b8: 0x0200
kfdhdb.blksize: 4096 ; 0x0ba: 0x1000
kfdhdb.ausize: 2097152 ; 0x0bc: 0x00200000
kfdhdb.mfact: 228480 ; 0x0c0: 0x00037c80
kfdhdb.dsksize: 5118 ; 0x0c4: 0x000013fe
kfdhdb.pmcnt: 3 ; 0x0c8: 0x00000003
kfdhdb.fstlocn: 1 ; 0x0cc: 0x00000001
kfdhdb.altlocn: 2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn: 10 ; 0x0d4: 0x0000000a


3：au size 为4M
[grid@12cdb1 ~]$ kfed read /dev/sde1 aunum=1 blknum=1022 ausz=4194304|more
kfbh.endian: 1 ; 0x000: 0x01
kfbh.hard: 130 ; 0x001: 0x82
kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt: 1 ; 0x003: 0x01
kfbh.block.blk: 1022 ; 0x004: blk=1022
kfbh.block.obj: 2147483648 ; 0x008: disk=0
kfbh.check: 3190465891 ; 0x00c: 0xbe2aa563
kfbh.fcn.base: 0 ; 0x010: 0x00000000
kfbh.fcn.wrap: 0 ; 0x014: 0x00000000
kfbh.spare1: 0 ; 0x018: 0x00000000
kfbh.spare2: 0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8
kfdhdb.driver.reserved[0]: 0 ; 0x008: 0x00000000
kfdhdb.driver.reserved[1]: 0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]: 0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]: 0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]: 0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]: 0 ; 0x01c: 0x00000000
kfdhdb.compat: 202375168 ; 0x020: 0x0c100000
kfdhdb.dsknum: 0 ; 0x024: 0x0000
kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname: DGTEST_0000 ; 0x028: length=11
kfdhdb.grpname: DGTEST ; 0x048: length=6
kfdhdb.fgname: DGTEST_0000 ; 0x068: length=11
kfdhdb.capname: ; 0x088: length=0
kfdhdb.crestmp.hi: 33005044 ; 0x0a8: HOUR=0x14 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.crestmp.lo: 1762242560 ; 0x0ac: USEC=0x0 MSEC=0x26c SECS=0x10 MINS=0x1a
kfdhdb.mntstmp.hi: 33005044 ; 0x0b0: HOUR=0x14 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.mntstmp.lo: 1775450112 ; 0x0b4: USEC=0x0 MSEC=0xce SECS=0x1d MINS=0x1a
kfdhdb.secsize: 512 ; 0x0b8: 0x0200
kfdhdb.blksize: 4096 ; 0x0ba: 0x1000
kfdhdb.ausize: 4194304 ; 0x0bc: 0x00400000
kfdhdb.mfact: 454272 ; 0x0c0: 0x0006ee80
kfdhdb.dsksize: 511 ; 0x0c4: 0x000001ff
kfdhdb.pmcnt: 3 ; 0x0c8: 0x00000003
kfdhdb.fstlocn: 1 ; 0x0cc: 0x00000001
kfdhdb.altlocn: 2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn: 10 ; 0x0d4: 0x0000000a
kfdhdb.redomirrors[0]: 0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]: 0 ; 0x0da: 0x0000
kfdhdb.redomirrors[2]: 0 ; 0x0dc: 0x0000
kfdhdb.redomirrors[3]: 0 ; 0x0de: 0x0000
kfdhdb.dbcompat: 168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi: 33005044 ; 0x0e4: HOUR=0x14 DAYS=0xf MNTH=0x7 YEAR=0x7de
kfdhdb.grpstmp.lo: 1761989632 ; 0x0e8: USEC=0x0 MSEC=0x175 SECS=0x10 MINS=0x1a


4：au size 为8M

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asm disk header Oracle备份 Oracl
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